mbs-6858: fixing outdated link to relationship docs
mbs-6858: change uri_for to uri_for_action as ocharles requested
Merge branch 'beta' of https://bitbucket.org/metabrainz/musicbrainz-server into mbs-6858
mbs-6858: change this to use uri_for_action in the correct way
Merge remote-tracking branch 'reosarevok/mbs-6858' into beta